* {
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
}

h1 {
  width: 100%;
  height: 80px;
  background-color: skyblue;
  display: flex;
  justify-content: center;
  align-items: center;
}

h1 > a {
  margin-left: 100px;
}

.container {
  width: 1200px;
  flex: 1;
  margin: 10px auto;
  overflow: auto;
}

p {
  line-height: 30px;
  font-size: 20px;
  margin: 5px 0;
}

p span {
  background-color: #ccc;
  color: #fff;
  padding: 5px;
}

p > i {
  display: block;
  padding-left: 30px;
  margin: 5px 0;
}
